Hi, everyone

I am looking for some guidance on planning a trip. Long story short, I got a golden opportunity for a free flight to London and a free return flight also from London. I'd land in London at noon on Dec 28th, and I would be leaving around noon on the 14th of January. I have family in London, so I will spend the first day with them on the 28th, and then leave to the EU the morning of the 29th. I will be taking public transit from there on out until arriving back to London on the 14th (or 13th)

My hope is to hit these countries: Belgium (just Brussels), Netherlands, Germany, and Denmark.

My incredibly rough draft is this:

London: 28th

Belgium: 29th (1 night)

Netherlands: 30th-3rd (5 nights)

Germany: 4th-8th (5 nights)

Denmark: 9th-12th or 13th (4-5 nights)

Curious how you guys feel about this rough itinerary in general. I'm trying to see as much as I can in the days I do have. I could add a day, most likely. I also am willing to budge on how many nights in each place. Maybe less in Netherlands, more in Germany? I'm hoping to see the major cities like Copenhagen, Berlin, Amsterdam, while still getting to venture out a bit to other parts of the countries but not too far. Møn Island looks unbelievable, and I'd love to see it. I'm also open to suggestions of other areas in these countries.

Also, what do you think of that route? The downside is that it is a long time to get from Denmark back to London, so that would mean the 13th would probably just be a long travel day, which is fine. But do you think there's another way I could route it that might be more efficient? I could also arrange it so that it's Belgium > Germany > Denmark > Netherlands. If I did that, would I be able to take the transit from Amsterdam to London on the night of the 13th? That would be preferable over a full day of travel.

I could also move Belgium to being the last day (13th) and just leave in the evening to get to London. Let me know your guys thoughts!